Northwest Water
Washington - Community Water System - PWSID: WA5302287
System Information
| PWSID | WA5302287 |
| System Name | Northwest Water |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Private |
| EPA Region | 10 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Dec 30, 1986 |
| Last Reported | Mar 26, 2026 |
Location & Contact
| State | Washington |
| City | Coupeville |
| ZIP Code | 98239 |
| Address | 102 SW Terry Rd |
| Organization | Northwest Water |
| Phone | - |
Population & Service
| Population Served | 99 |
| Service Connections | 35 |
Drinking Water Violations (57)
This water system has 57 violations recorded in the EPA SDWIS database.
| Begin Date | End Date | Contaminant | Category | Health-Based | Major | Measured | Federal MCL | State MCL | Status | Return to Compliance | Rule |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan 1, 2022 | Dec 31, 2022 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2022 | - | |
| Jan 1, 2020 | - | MR | No | No | - | TT | - | Resolved | Jul 24, 2023 | - | |
| Jul 1, 2016 | - | Other | No | No | - | - | - | Resolved | Dec 19, 2016 | - | |
| Jul 1, 2015 | - | Other | No | No | - | - | - | Resolved | Sep 21, 2015 | - | |
| Nov 1, 2012 | Nov 30, 2012 | MR | No | No | - | 5% of samples | - | Resolved | Nov 30, 2012 | - | |
| Jan 1, 2007 | - | MR | No | No | - | TT | - | Resolved | Dec 31, 2007 | - | |
| Jan 1, 2007 | - | MR | No | No | - | TT | - | Resolved | Dec 31, 2007 | - | |
| Jan 1, 2007 | - | MR | No | No | - | TT | - | Resolved | Dec 31, 2007 | - | |
| Jan 1, 2007 | - | MR | No | No | - | TT | - | Resolved | Dec 31, 2007 | - | |
| Jan 1, 2007 | - | MR | No | No | - | TT | - | Resolved | Dec 31, 2007 | - | |
| Jan 1, 2007 | - | MR | No | No | - | TT | - | Resolved | Dec 31, 2007 | - | |
| Jan 1, 2007 | - | MR | No | No | - | TT | - | Resolved | Dec 31, 2007 | - | |
| Jan 1, 2002 | Dec 31, 2004 | MR | No | Yes | - | 0.07 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2002 | Dec 31, 2004 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2002 | Dec 31, 2004 | MR | No | Yes | - | 0.7 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2002 | Dec 31, 2004 | MR | No | Yes | - | 0.2 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2002 | Dec 31, 2004 | MR | No | Yes | - | 0.07 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2002 | Dec 31, 2004 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2002 | Dec 31, 2004 | MR | No | Yes | - | 0.007 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2002 | Dec 31, 2004 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2002 | Dec 31, 2004 | MR | No | Yes | - | 0.6 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2002 | Dec 31, 2004 | MR | No | Yes | - | 0.002 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2002 | Dec 31, 2004 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2002 | Dec 31, 2004 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2002 | Dec 31, 2004 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2002 | Dec 31, 2004 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2002 | Dec 31, 2004 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2002 | Dec 31, 2004 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2002 | Dec 31, 2004 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2002 | Dec 31, 2004 | MR | No | Yes | - | 1 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2002 | Dec 31, 2004 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2002 | Dec 31, 2004 | MR | No | Yes | - | 0.075 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Nov 1, 2000 | Nov 30, 2000 | MCL | Yes | No | - | 5% of samples | - | Archived | Nov 30, 2000 | - | |
| Nov 1, 2000 | Nov 30, 2000 | MCL | Yes | No | - | 5% of samples | - | Archived | Nov 30, 2000 | - | |
| Nov 1, 2000 | Nov 30, 2000 | MCL | Yes | No | - | 5% of samples | - | Archived | Nov 30, 2000 | - | |
| Jun 1, 2000 | Jun 30, 2000 | MR | No | Yes | - | 5% of samples | - | Archived | Jun 30, 2000 | - | |
| Jan 1, 1999 | Jan 1, 2000 | MR | No | No | - | TT | - | Resolved | Jan 1, 2000 | - | |
| Nov 1, 1998 | Nov 30, 1998 | MCL | Yes | No | - | 5% of samples | - | Archived | Nov 30, 1998 | - | |
| Nov 1, 1998 | Nov 30, 1998 | MCL | Yes | No | - | 5% of samples | - | Archived | Nov 30, 1998 | - | |
| Nov 1, 1998 | Nov 30, 1998 | MCL | Yes | No | - | 5% of samples | - | Archived | Nov 30, 1998 | - | |
| Oct 1, 1998 | Oct 31, 1998 | MCL | Yes | No | - | 5% of samples | - | Archived | Oct 31, 1998 | - | |
| Oct 1, 1998 | Oct 31, 1998 | MCL | Yes | No | - | 5% of samples | - | Archived | Oct 31, 1998 | - | |
| Oct 1, 1998 | Oct 31, 1998 | MCL | Yes | No | - | 5% of samples | - | Archived | Oct 31, 1998 | - | |
| Sep 1, 1998 | Sep 30, 1998 | MR | No | Yes | - | 5% of samples | - | Archived | Sep 30, 1998 | - | |
| Aug 1, 1998 | Aug 31, 1998 | MCL | Yes | No | - | 5% of samples | - | Archived | Aug 31, 1998 | - | |
| Aug 1, 1998 | Aug 31, 1998 | MCL | Yes | No | - | 5% of samples | - | Archived | Aug 31, 1998 | - | |
| Aug 1, 1998 | Aug 31, 1998 | MCL | Yes | No | - | 5% of samples | - | Archived | Aug 31, 1998 | - | |
| Jul 1, 1998 | Jul 31, 1998 | MCL | Yes | No | - | 5% of samples | - | Archived | Jul 31, 1998 | - | |
| Jul 1, 1998 | Jul 31, 1998 | MCL | Yes | No | - | 5% of samples | - | Archived | Jul 31, 1998 | - | |
| Jul 1, 1998 | Jul 31, 1998 | MCL | Yes | No | - | 5% of samples | - | Archived | Jul 31, 1998 | - |
About This Water System
Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.